Evaluation of Retention of Two Implants Retained Mandibular Complete Overdenture with Telescopic Attachments of Different Biocompatible Materials | ||||
| Al-Azhar Assiut Dental Journal | ||||
| Volume 7, Issue 2, October 2024, Page 167-175 PDF (1.95 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/aadj.2024.235088.1158 | ||||
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| Authors | ||||
Enas Rabie Mohamed  1; Mostafa Abosrie Ali2; Mahmoud Mohamed Ammar2; Shaimaa Ahmed Radwan3
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| 1Department of removable prosthodontics , faculty of dental medicine , Assiut branch , Al-Azhar university | ||||
| 2Department of Removable Prosthodontic, Faculty of Dental Medicine, Al-Azhar University, Assuit, Egypt. | ||||
| 3Department of prosthodontic, Faculty of dentistry ,Minia university, Egypt | ||||
| Abstract | ||||
| Aim: The objective of this investigation was to assess and compare the retention of two implants that maintained complete mandibular overdentures with telescopic attachments made entirely of zirconia (ZrO2), entirely of polyether-ether-ketone (PEEK), and ZrO2-PEEK ,Subjects and methods: Three acrylic edentulous mandibular overdenture models were separated into three main groups based on their telescoping attachment systems: group ZZ was made up entirely of ZrO2; PP group was made entirely of PEEK; and ZP group was made up entirely of ZrO2 (primary crown)-PEEK (secondary crown). The acrylic models were scanned with a laboratory scanner to gain a three‐dimensional (3D) virtual image and the primary crowns were CAD designed to ensure a similar insertion route and then milled from ZrO2 and PEEK blanks. Each primary crown was then scanned separately and the secondary crown was created with mechanical projections and then milled. After that, mandibular acrylic overdenture with a metal framework and the metallic lingual bar were fabricated. For measuring the retention forces of each telescopic crown type, a universal testing machine (UTM) was utilized to employ 400, 600, 1200, 1500, and 1800 cycles of removal and insertion to the metal bar during the retention test. Results: The outcomes revealed that the ZZ group possessed significantly greater mean retentive forces followed by PP and then the ZP group. However, the retentive forces decreased respectively with an increase in the number of cycles. Conclusion: Despite the loss of retention over time, PEEK remains suitable for use as a secondary telescopic crown in substitution of zirconia or PEEK main crowns | ||||
| Keywords | ||||
| Zirconia telescopic crown; PEEK telescopic crown; Implants-Retained Overdenture; Retention; Telescopic Attachments | ||||
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